<template>
  <div class="app-container">
    添加讲师
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>
      <!-- 讲师头像：TODO -->
      <el-form-item label="讲师头像">
        <pan-thumb :image="teacher.avatar"/>
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">选择头像
        </el-button>
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/vod/eduoss/file/upload'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"/>
      </el-form-item>
      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
  import teacher from '@/api/edu/teacher'
  import ImageCropper from '@/components/ImageCropper'
  import PanThumb from '@/components/PanThumb'
  export default {
    components: {ImageCropper,PanThumb},
    data() {
      return {
        teacher: {
          name: '',
          sort: 0,
          level: 1,
          career: '',
          intro: '',
          avatar: '',
        },
        imagecropperShow: false,
        imagecropperKey:0,
        BASE_API:process.env.BASE_API,
        saveBtnDisabled: false // 保存按钮是否禁用,
      }
    },
    watch:{
      $route(to, from) {
        this.init()
      }
    },
    created() {
      this.init()
    },
    methods: {
      close(){
        this.imagecropperShow = false
        this.imagecropperKey=this.imagecropperKey+1
      },
      cropSuccess(data){
        this.imagecropperShow = false
        this.teacher.avatar = data.url
        this.imagecropperKey=this.imagecropperKey+1
      },
      init() {
        if (this.$route.params && this.$route.params.id) {
          const id = this.$route.params.id
          this.fetchDataById(id)
        } else {
          this.teacher = {}
        }
      },
      fetchDataById(id) {
        teacher.getById(id).then(response => {
          this.teacher = response.data.item
        }).catch((response) => {
          this.$message({
            type: 'error',
            message: '获取数据失败'
          })
        })
      },
      saveOrUpdate() {
        this.saveBtnDisabled = true
        if (!this.teacher.id) {
          this.saveData()
        } else {
          this.updateData()
        }
      },
      // 保存
      saveData() {
        teacher.save(this.teacher).then(response => {
          return this.$message({
            type: 'success',
            message: '保存成功!'
          })
        }).then(resposne => {
          this.$router.push({ path: '/teacher/list'})
        }).catch((response) => {
          // console.log(response)
          this.$message({
            type: 'error',
            message: '保存失败'
          })
        })
      },
      updateData() {
        this.saveBtnDisabled = true
        teacher.updateById(this.teacher).then(response => {
          return this.$message({
            type: 'success',
            message: '修改成功!'
          })
        }).then(resposne => {
          this.$router.push({ path: '/teacher/list' })
        }).catch((response) => {
          // console.log(response)
          this.$message({
            type: 'error',
            message: '保存失败'
          })

        })
      }
    }
  }
</script>
